定義域?yàn)椋?∞,-1)∪(1,+∞)
所以r≥1或a-2≤-1
當(dāng)r≥1時a-2>1,a>3
由于(1+x)/(x-1)在(1,+∞)遞減
所以f(x)在(1,+∞)遞減,故f(x)在(r,a-2)遞減
此時f(a-2)=1解得a=2+√3,且此時r=1
當(dāng)a-2≤-1即0
f(x)=loga(1+x)/(x-1)當(dāng)x屬于(r,a-2)時,函數(shù)f(x)的值域是(1,正無窮),求實(shí)數(shù)a和r的值
f(x)=loga(1+x)/(x-1)當(dāng)x屬于(r,a-2)時,函數(shù)f(x)的值域是(1,正無窮),求實(shí)數(shù)a和r的值
數(shù)學(xué)人氣:833 ℃時間:2019-09-29 04:03:38
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